Its frustrating when an actors lips dont match the sound on your Samsung TV.
I will tell you about the possible problems and how to fix the audio mis-synchronization.
Each case requires a different approach to solving the problem.
Valeriy Artamonov
Heres an explanation of how audio synchronization functions in this context.
The TV doesnt discriminate between sources, be it HDMI, antenna input, or integrated applications.
The televisions processor handles this digital stream, effectively separating the audio and video components.
Audio and video are synchronized during transmission and will always be shown in sync.
But if you notice such a situation, heres what to do.
You may have changed the sound tweaks or accidentally changed some tweaks.
In this case, reset the sound to avoid unnecessary controls checking.
Here is the path to reset sound controls.
Why is there an audio delay when using ARC HDMI?
After receiving the video signal, the TV separates the Audio and video.
The soundbar decodes the Audio itself, but technical nuances may lead to picture and sound resynchronization.
you’re able to adjust the audio output delay and thus synchronize the picture and sound.
This is best done on videos where you could see the actors or singers lips.
Tip: Search YouTube for a music single or news channel with an announcer.
Be sure to check the prefs on different videos.
The default setting forARC (eARC)-enabled HDMI ports is 100(100 milliseconds).
This setting allows you to adjust the audio delay between0 and 250.
The maximum audio delay can be 250 milliseconds.
This will reduce the time the TV takes to process the picture, and the sound may synchronize.
Unfortunately, no setting on the Samsung TV adjusts the audio delay time.
Bluetooth is unsuitable for soundbars; Bluetooth connectivity is commonly used in headphones.
How Bluetooth audio is transmitted and works in Samsung TV.
This manipulation of the audio stream introduces a delay in the signal.
This setting is built into the OS and is applied when you choose to output audio via bluetooth.
At least, thats how the Samsung TV works.
Lip sync in Samsung TVs and soundbars.
In soundbars, there are better options than bluetooth for audio transmission.
Therefore, there are usually no additional parameters to synchronize the sound and picture on the TV screen.
So, if you opt for a Bluetooth-connected soundbar, you will get sound as it is.
WiFi Audio delay in Samsung TV
Some sound bars or wireless speakers support Wi-Fi connection.
In this case, the connection and sound transmission are similar to Bluetooth.
Samsung warns that when using Wi-Fi as the soundbar connection method, lip movement and sound may not match.
Unfortunately, Samsung TVs dont have parameters that regulate how time sound is transmitted over Wi-Fi.
However, there is no guarantee that you will be able to fix the audio and video out-of-sync problem.
I find it quite complicated and unnecessary.
For example, do you know what codec Netflix encodes its video with?
The leading codec is AV1, but some videos may use the HEVC codec.
YouTube uses the VP9 codec.
So, checking codecs is burdensome and unnecessary.
Its easier to open another video and check the sound.
Codecs work faster, and bugs are fixed so that a software update can fix some problems.
Be sure to check for new updates and install them.
